11. Unfavorable rotation speed or flameout during acceleration
Common trouble location:
1. Fuel with water; 2. Intake air pressure sensor and throttle position sensor;
3. Spark plug; 4. Throttle body and idle speed by-pass air way;
5. Intake air way; 6. Idle speed regulator;
7. Fuel injector; 8. Ignition timing; 9. Exhaust pipe.
Diagnosis Flow
Table 1-77
S/N Operation Test Results Actions
Yes
Check and repair air
intake system
1 Check if the air filter is blocked.
No Next step
Yes Next step
2
Connect the fuel pressure gauge (the connection point
is the front end of the intake pipe of the fuel distribution
pipe assembly), and start the engine. Check if the fuel
pressure of the engine under full working condition is
about 350kPa.
No
Check and repair fuel
supply system
Yes Next step
3
Check the spark plug for each cylinder. Check if its
model and gap can meet with starndards.
No Adjust or replace
Yes Wash relevant parts
4
Remove the idle speed regulator. Check the throttle
body, idle speed regulator, and idle speed by-pass air
way for carbon deposition.
No Next step
Yes Next step
5
Check the intake air pressure sensor, throttle position
sensor and the lines for normal operation.
No Replace sensor
Yes Remove the trouble
6
Remove the fuel injector. Check the fuel injector for
leakage or blockage with a special fuel injector cleaner
& analyzer.
No Next step
Yes Replace fuel
No Next step
7 Check the fuel for normal operation.
Yes Next step
8
Check if the ignition sequence and timing of the engine
can meet with the standards.
No
Check and repair
ignition timing
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